Related Party Transactions - Additional Information (Detail) (SPC Global RE Advisors LLC [Member], USD $)	Sep. 30, 2014	Dec. 31, 2013
SPC Global RE Advisors LLC [Member]
Related Party Transaction [Line Items]
Payments due to related party	$ 0	$ 0

Carrying amount as of the balance sheet date of obligations due all related parties.

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Name:	us-gaap_DueToRelatedPartiesCurrentAndNoncurrent
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant